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Welcome to Oracle 1z0-808 practice test online

QUESTION 1
Given:

What is the result?
A. C2C2
B. C1C2
C. C1C1
D. Compilation fails
Correct Answer: D

QUESTION 2
Consider
Integer number = Integer.valueOff 808.1″);
Which is true about the above statement?
A. The value of the variable number will be 808.1
B. The value of the variable number will be 808
C. The value of the variable number will be 0.
D. A NumberFormatException will be throw.
E. It will not compile.
Correct Answer: D
The Integer class value of 0 returns an Integer from given string. But we need to pass string which has correct format for
integer otherwise it will throw a NumberFormatException. In this case we have passed string which is not an integer
value (since what we passed is fractional number), so option D is correct.

QUESTION 3
Given this code for the classes MyException and Test:

What is the result?
A. A
B. AB
C. A compile time error occurs at line n1.
D. B
E. I
Correct Answer: C

QUESTION 4
Given the fragments:

Which line causes a compilation error?
A. Line n1
B. Line n2
C. Line n3
D. Line n4
Correct Answer: A

QUESTION 5
Given the code fragments:

Which statement is true?
A. After line 11, three objects are eligible for garbage collection.
B. After line 11, two objects are eligible for garbage collection.
C. After line 11, one object is eligible for garbage collection.
D. After line 11, none of the objects are eligible for garbage collection.
Correct Answer: C

QUESTION 6
Given the following code for a Planet object:

A. Option A
B. Option B
C. Option C
D. Option D
E. Option E
Correct Answer: C

QUESTION 7
Given the code fragments:

What is the result?
A. Super Sub Sub
B. Contract Contract Super
C. Compilation fails at line n1
D. Compilation fails at line n2
Correct Answer: D

QUESTION 8
Given the code fragment:

Which modification enables the code fragment to print TrueDone?
A. Replace line 5 With String result = “true”; Replace line 7 with case “true”:
B. Replace line 5 with boolean opt = l; Replace line 7 with case 1=
C. At line 9, remove the break statement.
D. Remove the default section.
Correct Answer: A

QUESTION 9
Given:

What is the result?
A. 3 4 5 6
B. 3 4 3 6
C. 5 4 5 6
D. 3 6 4 6
Correct Answer: C

QUESTION 10
Given the code fragment:

Which code fragment, inserted at line n1, prints The Top element: 30?

A. Option A
B. Option B
C. Option C
D. Option D
E. Option E
Correct Answer: C

QUESTION 11
Given the code fragment:

What is the result?
A. 3
B. 4
C. -1
D. Compilation fails.
Correct Answer: A

QUESTION 12
Given:
public class Marklist {
int num;
public static void graceMarks(Marklist obj4) {
obj4.num += 10;
}
public static void main(String[] args) {
MarkList obj1 = new MarkList();
MarkList obj2 = obj1;
MarkList obj1 = null;
obj2.num = 60;
graceMarks(obj2);
}
}
How many objects are created in the memory runtime?
A. 1
B. 2
C. 3
D. 4
Correct Answer: B
Explanation: obj1 and obj3.
when you do e2 = e1 you\\’re copying object references – you\\’re not making a copy of the object – and so the variables
e1 and e2 will both point to the same object.

QUESTION 13
Given:

What is the result?
A. 2 4 6 8
B. 2 4 6 8 9
C. 1 3 5 7
D. 1 3 5 7 9
Correct Answer: D

to sum up:

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